“Can you boil water for formula in advance?”

Boiling water for formula is not recommended. When you boil the water, the "pure water" escapes as vapor, leaving the toxins, heavy metals and other contaminates behind. (That "vapor," when captured, is how to make "distilled water.") Therefore, you have essentially INCREASED the concentration of the precise elements that you were trying to eliminate. Use bottled water or water filtered through a commercial filtration system.

Shelley C. Springer, MD, MBA, MSc, JD, FAAP

Yes you can

Yes, you can, however, you can use distilled water as well.